Neck rein
![Neck reining a horse to the right by putting pressure on the left side of the neck.](/Images/godic/202501/29/Marmemmano8_trabend_seitlicha4243.jpg")
A neck rein is a type of indirect rein aid. The horse responds to a neck rein when it has learned that a light pressure of the right rein against its neck on that side means for the horse to turn left, and vice versa.
The neck rein is used in both English riding and in Western riding, though the style differs between the disciplines.